I include them as needed, and I never seem to have problems.

I read this as require 'myscript.pl';
It's a small but important step to change this to use myscript, IMHO, as it clarifies the meaning and just makes your actual used-as-a-module script a real perl-module (following the tips and links given to you already).

If I misread this, and including means cut & paste, let not speed, memory, efficiency of the code and such be your first concern, but maintainabilty: turn your code into a module / modules for the sanity of those following you or accompaning you in your coding projects, again by following the tips and links given to you allready.

kind regards,
tomte

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Hlade's Law:

If you have a difficult task, give it to a lazy person --
they will find an easier way to do it.

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